I think i as experiencing some problem with erection. As it lasts for like 30-45 mins and maximum i can go for 2 rounds. But as compared to my age is it normal or a warning sign. I often have physical contact like thrice a month and is it good to keep going the same at this age . I mean it doesnt harms,right? And also if i keep this thrice a month routine continued, would it affect my erection or capability to have sex?